telegraf/plugins/inputs/vsphere/endpoint.go

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package vsphere
import (
"context"
"errors"
"fmt"
"log"
"math/rand"
"net/url"
"regexp"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/influxdata/telegraf/filter"
"github.com/influxdata/telegraf"
"github.com/vmware/govmomi/object"
"github.com/vmware/govmomi/performance"
"github.com/vmware/govmomi/vim25/mo"
"github.com/vmware/govmomi/vim25/types"
)
var isolateLUN = regexp.MustCompile(".*/([^/]+)/?$")
const metricLookback = 3 // Number of time periods to look back at for non-realtime metrics
const rtMetricLookback = 3 // Number of time periods to look back at for realtime metrics
const maxSampleConst = 10 // Absolute maximim number of samples regardless of period
const maxMetadataSamples = 100 // Number of resources to sample for metric metadata
// Endpoint is a high-level representation of a connected vCenter endpoint. It is backed by the lower
// level Client type.
type Endpoint struct {
Parent *VSphere
URL *url.URL
resourceKinds map[string]*resourceKind
hwMarks *TSCache
lun2ds map[string]string
discoveryTicker *time.Ticker
collectMux sync.RWMutex
initialized bool
clientFactory *ClientFactory
busy sync.Mutex
}
type resourceKind struct {
name string
vcName string
pKey string
parentTag string
enabled bool
realTime bool
sampling int32
objects objectMap
filters filter.Filter
paths []string
collectInstances bool
getObjects func(context.Context, *Endpoint, *ResourceFilter) (objectMap, error)
include []string
simple bool
metrics performance.MetricList
parent string
latestSample time.Time
lastColl time.Time
}
type metricEntry struct {
tags map[string]string
name string
ts time.Time
fields map[string]interface{}
}
type objectMap map[string]objectRef
type objectRef struct {
name string
altID string
ref types.ManagedObjectReference
parentRef *types.ManagedObjectReference //Pointer because it must be nillable
guest string
dcname string
}
func (e *Endpoint) getParent(obj *objectRef, res *resourceKind) (*objectRef, bool) {
if pKind, ok := e.resourceKinds[res.parent]; ok {
if p, ok := pKind.objects[obj.parentRef.Value]; ok {
return &p, true
}
}
return nil, false
}
// NewEndpoint returns a new connection to a vCenter based on the URL and configuration passed
// as parameters.
func NewEndpoint(ctx context.Context, parent *VSphere, url *url.URL) (*Endpoint, error) {
e := Endpoint{
URL: url,
Parent: parent,
hwMarks: NewTSCache(1 * time.Hour),
lun2ds: make(map[string]string),
initialized: false,
clientFactory: NewClientFactory(ctx, url, parent),
}
e.resourceKinds = map[string]*resourceKind{
"datacenter": {
name: "datacenter",
vcName: "Datacenter",
pKey: "dcname",
parentTag: "",
enabled: anythingEnabled(parent.DatacenterMetricExclude),
realTime: false,
sampling: 300,
objects: make(objectMap),
filters: newFilterOrPanic(parent.DatacenterMetricInclude, parent.DatacenterMetricExclude),
paths: parent.DatacenterInclude,
simple: isSimple(parent.DatacenterMetricInclude, parent.DatacenterMetricExclude),
include: parent.DatacenterMetricInclude,
collectInstances: parent.DatacenterInstances,
getObjects: getDatacenters,
parent: "",
},
"cluster": {
name: "cluster",
vcName: "ClusterComputeResource",
pKey: "clustername",
parentTag: "dcname",
enabled: anythingEnabled(parent.ClusterMetricExclude),
realTime: false,
sampling: 300,
objects: make(objectMap),
filters: newFilterOrPanic(parent.ClusterMetricInclude, parent.ClusterMetricExclude),
paths: parent.ClusterInclude,
simple: isSimple(parent.ClusterMetricInclude, parent.ClusterMetricExclude),
include: parent.ClusterMetricInclude,
collectInstances: parent.ClusterInstances,
getObjects: getClusters,
parent: "datacenter",
},
"host": {
name: "host",
vcName: "HostSystem",
pKey: "esxhostname",
parentTag: "clustername",
enabled: anythingEnabled(parent.HostMetricExclude),
realTime: true,
sampling: 20,
objects: make(objectMap),
filters: newFilterOrPanic(parent.HostMetricInclude, parent.HostMetricExclude),
paths: parent.HostInclude,
simple: isSimple(parent.HostMetricInclude, parent.HostMetricExclude),
include: parent.HostMetricInclude,
collectInstances: parent.HostInstances,
getObjects: getHosts,
parent: "cluster",
},
"vm": {
name: "vm",
vcName: "VirtualMachine",
pKey: "vmname",
parentTag: "esxhostname",
enabled: anythingEnabled(parent.VMMetricExclude),
realTime: true,
sampling: 20,
objects: make(objectMap),
filters: newFilterOrPanic(parent.VMMetricInclude, parent.VMMetricExclude),
paths: parent.VMInclude,
simple: isSimple(parent.VMMetricInclude, parent.VMMetricExclude),
include: parent.VMMetricInclude,
collectInstances: parent.VMInstances,
getObjects: getVMs,
parent: "host",
},
"datastore": {
name: "datastore",
vcName: "Datastore",
pKey: "dsname",
enabled: anythingEnabled(parent.DatastoreMetricExclude),
realTime: false,
sampling: 300,
objects: make(objectMap),
filters: newFilterOrPanic(parent.DatastoreMetricInclude, parent.DatastoreMetricExclude),
paths: parent.DatastoreInclude,
simple: isSimple(parent.DatastoreMetricInclude, parent.DatastoreMetricExclude),
include: parent.DatastoreMetricInclude,
collectInstances: parent.DatastoreInstances,
getObjects: getDatastores,
parent: "",
},
}
// Start discover and other goodness
err := e.init(ctx)
return &e, err
}
func anythingEnabled(ex []string) bool {
for _, s := range ex {
if s == "*" {
return false
}
}
return true
}
func newFilterOrPanic(include []string, exclude []string) filter.Filter {
f, err := filter.NewIncludeExcludeFilter(include, exclude)
if err != nil {
panic(fmt.Sprintf("Include/exclude filters are invalid: %s", err))
}
return f
}
func isSimple(include []string, exclude []string) bool {
if len(exclude) > 0 || len(include) == 0 {
return false
}
for _, s := range include {
if strings.Contains(s, "*") {
return false
}
}
return true
}
func (e *Endpoint) startDiscovery(ctx context.Context) {
e.discoveryTicker = time.NewTicker(e.Parent.ObjectDiscoveryInterval.Duration)
go func() {
for {
select {
case <-e.discoveryTicker.C:
err := e.discover(ctx)
if err != nil && err != context.Canceled {
log.Printf("E! [inputs.vsphere]: Error in discovery for %s: %v", e.URL.Host, err)
}
case <-ctx.Done():
log.Printf("D! [inputs.vsphere]: Exiting discovery goroutine for %s", e.URL.Host)
e.discoveryTicker.Stop()
return
}
}
}()
}
func (e *Endpoint) initalDiscovery(ctx context.Context) {
err := e.discover(ctx)
if err != nil && err != context.Canceled {
log.Printf("E! [inputs.vsphere]: Error in discovery for %s: %v", e.URL.Host, err)
}
e.startDiscovery(ctx)
}
func (e *Endpoint) init(ctx context.Context) error {
if e.Parent.ObjectDiscoveryInterval.Duration > 0 {
// Run an initial discovery. If force_discovery_on_init isn't set, we kick it off as a
// goroutine without waiting for it. This will probably cause us to report an empty
// dataset on the first collection, but it solves the issue of the first collection timing out.
if e.Parent.ForceDiscoverOnInit {
log.Printf("D! [inputs.vsphere]: Running initial discovery and waiting for it to finish")
e.initalDiscovery(ctx)
} else {
// Otherwise, just run it in the background. We'll probably have an incomplete first metric
// collection this way.
go func() {
e.initalDiscovery(ctx)
}()
}
}
e.initialized = true
return nil
}
func (e *Endpoint) getMetricNameMap(ctx context.Context) (map[int32]string, error) {
client, err := e.clientFactory.GetClient(ctx)
if err != nil {
return nil, err
}
mn, err := client.CounterInfoByName(ctx)
if err != nil {
return nil, err
}
names := make(map[int32]string)
for name, m := range mn {
names[m.Key] = name
}
return names, nil
}
func (e *Endpoint) getMetadata(ctx context.Context, obj objectRef, sampling int32) (performance.MetricList, error) {
client, err := e.clientFactory.GetClient(ctx)
if err != nil {
return nil, err
}
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
metrics, err := client.Perf.AvailableMetric(ctx1, obj.ref.Reference(), sampling)
if err != nil {
return nil, err
}
return metrics, nil
}
func (e *Endpoint) getDatacenterName(ctx context.Context, client *Client, cache map[string]string, r types.ManagedObjectReference) string {
path := make([]string, 0)
returnVal := ""
here := r
for {
if name, ok := cache[here.Reference().String()]; ok {
// Populate cache for the entire chain of objects leading here.
returnVal = name
break
}
path = append(path, here.Reference().String())
o := object.NewCommon(client.Client.Client, r)
var result mo.ManagedEntity
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
err := o.Properties(ctx1, here, []string{"parent", "name"}, &result)
if err != nil {
log.Printf("W! [inputs.vsphere]: Error while resolving parent. Assuming no parent exists. Error: %s", err)
break
}
if result.Reference().Type == "Datacenter" {
// Populate cache for the entire chain of objects leading here.
returnVal = result.Name
break
}
if result.Parent == nil {
log.Printf("D! [inputs.vsphere]: No parent found for %s (ascending from %s)", here.Reference(), r.Reference())
break
}
here = result.Parent.Reference()
}
for _, s := range path {
cache[s] = returnVal
}
return returnVal
}
func (e *Endpoint) discover(ctx context.Context) error {
e.busy.Lock()
defer e.busy.Unlock()
if ctx.Err() != nil {
return ctx.Err()
}
metricNames, err := e.getMetricNameMap(ctx)
if err != nil {
return err
}
sw := NewStopwatch("discover", e.URL.Host)
client, err := e.clientFactory.GetClient(ctx)
if err != nil {
return err
}
log.Printf("D! [inputs.vsphere]: Discover new objects for %s", e.URL.Host)
resourceKinds := make(map[string]resourceKind)
dcNameCache := make(map[string]string)
numRes := int64(0)
// Populate resource objects, and endpoint instance info.
newObjects := make(map[string]objectMap)
for k, res := range e.resourceKinds {
log.Printf("D! [inputs.vsphere] Discovering resources for %s", res.name)
// Need to do this for all resource types even if they are not enabled
if res.enabled || k != "vm" {
rf := ResourceFilter{
finder: &Finder{client},
resType: res.vcName,
paths: res.paths}
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
objects, err := res.getObjects(ctx1, e, &rf)
if err != nil {
return err
}
// Fill in datacenter names where available (no need to do it for Datacenters)
if res.name != "Datacenter" {
for k, obj := range objects {
if obj.parentRef != nil {
obj.dcname = e.getDatacenterName(ctx, client, dcNameCache, *obj.parentRef)
objects[k] = obj
}
}
}
// No need to collect metric metadata if resource type is not enabled
if res.enabled {
if res.simple {
e.simpleMetadataSelect(ctx, client, res)
} else {
e.complexMetadataSelect(ctx, res, objects, metricNames)
}
}
newObjects[k] = objects
SendInternalCounterWithTags("discovered_objects", e.URL.Host, map[string]string{"type": res.name}, int64(len(objects)))
numRes += int64(len(objects))
}
}
// Build lun2ds map
dss := resourceKinds["datastore"]
l2d := make(map[string]string)
for _, ds := range dss.objects {
url := ds.altID
m := isolateLUN.FindStringSubmatch(url)
if m != nil {
l2d[m[1]] = ds.name
}
}
// Atomically swap maps
e.collectMux.Lock()
defer e.collectMux.Unlock()
for k, v := range newObjects {
e.resourceKinds[k].objects = v
}
e.lun2ds = l2d
sw.Stop()
SendInternalCounterWithTags("discovered_objects", e.URL.Host, map[string]string{"type": "instance-total"}, numRes)
return nil
}
func (e *Endpoint) simpleMetadataSelect(ctx context.Context, client *Client, res *resourceKind) {
log.Printf("D! [inputs.vsphere] Using fast metric metadata selection for %s", res.name)
m, err := client.CounterInfoByName(ctx)
if err != nil {
log.Printf("E! [inputs.vsphere]: Error while getting metric metadata. Discovery will be incomplete. Error: %s", err)
return
}
res.metrics = make(performance.MetricList, 0, len(res.include))
for _, s := range res.include {
if pci, ok := m[s]; ok {
cnt := types.PerfMetricId{
CounterId: pci.Key,
}
if res.collectInstances {
cnt.Instance = "*"
} else {
cnt.Instance = ""
}
res.metrics = append(res.metrics, cnt)
} else {
log.Printf("W! [inputs.vsphere] Metric name %s is unknown. Will not be collected", s)
}
}
}
func (e *Endpoint) complexMetadataSelect(ctx context.Context, res *resourceKind, objects objectMap, metricNames map[int32]string) {
// We're only going to get metadata from maxMetadataSamples resources. If we have
// more resources than that, we pick maxMetadataSamples samples at random.
sampledObjects := make([]objectRef, len(objects))
i := 0
for _, obj := range objects {
sampledObjects[i] = obj
i++
}
n := len(sampledObjects)
if n > maxMetadataSamples {
// Shuffle samples into the maxMetadatSamples positions
for i := 0; i < maxMetadataSamples; i++ {
j := int(rand.Int31n(int32(i + 1)))
t := sampledObjects[i]
sampledObjects[i] = sampledObjects[j]
sampledObjects[j] = t
}
sampledObjects = sampledObjects[0:maxMetadataSamples]
}
instInfoMux := sync.Mutex{}
te := NewThrottledExecutor(e.Parent.DiscoverConcurrency)
for _, obj := range sampledObjects {
func(obj objectRef) {
te.Run(ctx, func() {
metrics, err := e.getMetadata(ctx, obj, res.sampling)
if err != nil {
log.Printf("E! [inputs.vsphere]: Error while getting metric metadata. Discovery will be incomplete. Error: %s", err)
}
mMap := make(map[string]types.PerfMetricId)
for _, m := range metrics {
if m.Instance != "" && res.collectInstances {
m.Instance = "*"
} else {
m.Instance = ""
}
if res.filters.Match(metricNames[m.CounterId]) {
mMap[strconv.Itoa(int(m.CounterId))+"|"+m.Instance] = m
}
}
log.Printf("D! [inputs.vsphere] Found %d metrics for %s", len(mMap), obj.name)
instInfoMux.Lock()
defer instInfoMux.Unlock()
if len(mMap) > len(res.metrics) {
res.metrics = make(performance.MetricList, len(mMap))
i := 0
for _, m := range mMap {
res.metrics[i] = m
i++
}
}
})
}(obj)
}
te.Wait()
}
func getDatacenters(ctx context.Context, e *Endpoint, filter *ResourceFilter) (objectMap, error) {
var resources []mo.Datacenter
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
err := filter.FindAll(ctx1, &resources)
if err != nil {
return nil, err
}
m := make(objectMap, len(resources))
for _, r := range resources {
m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Parent, dcname: r.Name}
}
return m, nil
}
func getClusters(ctx context.Context, e *Endpoint, filter *ResourceFilter) (objectMap, error) {
var resources []mo.ClusterComputeResource
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
err := filter.FindAll(ctx1, &resources)
if err != nil {
return nil, err
}
cache := make(map[string]*types.ManagedObjectReference)
m := make(objectMap, len(resources))
for _, r := range resources {
// We're not interested in the immediate parent (a folder), but the data center.
p, ok := cache[r.Parent.Value]
if !ok {
ctx2, cancel2 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel2()
client, err := e.clientFactory.GetClient(ctx2)
if err != nil {
return nil, err
}
o := object.NewFolder(client.Client.Client, *r.Parent)
var folder mo.Folder
ctx3, cancel3 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel3()
err = o.Properties(ctx3, *r.Parent, []string{"parent"}, &folder)
if err != nil {
log.Printf("W! [inputs.vsphere] Error while getting folder parent: %e", err)
p = nil
} else {
pp := folder.Parent.Reference()
p = &pp
cache[r.Parent.Value] = p
}
}
m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: p}
}
return m, nil
}
func getHosts(ctx context.Context, e *Endpoint, filter *ResourceFilter) (objectMap, error) {
var resources []mo.HostSystem
err := filter.FindAll(ctx, &resources)
if err != nil {
return nil, err
}
m := make(objectMap)
for _, r := range resources {
m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Parent}
}
return m, nil
}
func getVMs(ctx context.Context, e *Endpoint, filter *ResourceFilter) (objectMap, error) {
var resources []mo.VirtualMachine
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
err := filter.FindAll(ctx1, &resources)
if err != nil {
return nil, err
}
m := make(objectMap)
for _, r := range resources {
if r.Runtime.PowerState != "poweredOn" {
continue
}
guest := "unknown"
uuid := ""
// Sometimes Config is unknown and returns a nil pointer
//
if r.Config != nil {
guest = cleanGuestID(r.Config.GuestId)
uuid = r.Config.Uuid
}
m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Runtime.Host, guest: guest, altID: uuid}
}
return m, nil
}
func getDatastores(ctx context.Context, e *Endpoint, filter *ResourceFilter) (objectMap, error) {
var resources []mo.Datastore
ctx1, cancel1 := context.WithTimeout(ctx, e.Parent.Timeout.Duration)
defer cancel1()
err := filter.FindAll(ctx1, &resources)
if err != nil {
return nil, err
}
m := make(objectMap)
for _, r := range resources {
url := ""
if r.Info != nil {
info := r.Info.GetDatastoreInfo()
if info != nil {
url = info.Url
}
}
m[r.ExtensibleManagedObject.Reference().Value] = objectRef{
name: r.Name, ref: r.ExtensibleManagedObject.Reference(), parentRef: r.Parent, altID: url}
}
return m, nil
}
// Close shuts down an Endpoint and releases any resources associated with it.
func (e *Endpoint) Close() {
e.clientFactory.Close()
}
// Collect runs a round of data collections as specified in the configuration.
func (e *Endpoint) Collect(ctx context.Context, acc telegraf.Accumulator) error {
// If we never managed to do a discovery, collection will be a no-op. Therefore,
// we need to check that a connection is available, or the collection will
// silently fail.
if _, err := e.clientFactory.GetClient(ctx); err != nil {
return err
}
e.collectMux.RLock()
defer e.collectMux.RUnlock()
if ctx.Err() != nil {
return ctx.Err()
}
// If discovery interval is disabled (0), discover on each collection cycle
if e.Parent.ObjectDiscoveryInterval.Duration == 0 {
err := e.discover(ctx)
if err != nil {
return err
}
}
var wg sync.WaitGroup
for k, res := range e.resourceKinds {
if res.enabled {
wg.Add(1)
go func(k string) {
defer wg.Done()
err := e.collectResource(ctx, k, acc)
if err != nil {
acc.AddError(err)
}
}(k)
}
}
wg.Wait()
// Purge old timestamps from the cache
e.hwMarks.Purge()
return nil
}
// Workaround to make sure pqs is a copy of the loop variable and won't change.
func submitChunkJob(ctx context.Context, te *ThrottledExecutor, job func([]types.PerfQuerySpec), pqs []types.PerfQuerySpec) {
te.Run(ctx, func() {
job(pqs)
})
}
func (e *Endpoint) chunkify(ctx context.Context, res *resourceKind, now time.Time, latest time.Time, acc telegraf.Accumulator, job func([]types.PerfQuerySpec)) {
te := NewThrottledExecutor(e.Parent.CollectConcurrency)
maxMetrics := e.Parent.MaxQueryMetrics
if maxMetrics < 1 {
maxMetrics = 1
}
// Workaround for vCenter weirdness. Cluster metrics seem to count multiple times
// when checking query size, so keep it at a low value.
// Revisit this when we better understand the reason why vCenter counts it this way!
if res.name == "cluster" && maxMetrics > 10 {
maxMetrics = 10
}
pqs := make([]types.PerfQuerySpec, 0, e.Parent.MaxQueryObjects)
metrics := 0
total := 0
nRes := 0
for _, object := range res.objects {
mr := len(res.metrics)
for mr > 0 {
mc := mr
headroom := maxMetrics - metrics
if !res.realTime && mc > headroom { // Metric query limit only applies to non-realtime metrics
mc = headroom
}
fm := len(res.metrics) - mr
pq := types.PerfQuerySpec{
Entity: object.ref,
MaxSample: maxSampleConst,
MetricId: res.metrics[fm : fm+mc],
IntervalId: res.sampling,
Format: "normal",
}
start, ok := e.hwMarks.Get(object.ref.Value)
if !ok {
// Look back 3 sampling periods by default
start = latest.Add(time.Duration(-res.sampling) * time.Second * (metricLookback - 1))
}
pq.StartTime = &start
pq.EndTime = &now
// Make sure endtime is always after start time. We may occasionally see samples from the future
// returned from vCenter. This is presumably due to time drift between vCenter and EXSi nodes.
if pq.StartTime.After(*pq.EndTime) {
log.Printf("D! [inputs.vsphere] Future sample. Res: %s, StartTime: %s, EndTime: %s, Now: %s", pq.Entity, *pq.StartTime, *pq.EndTime, now)
end := start.Add(time.Second)
pq.EndTime = &end
}
pqs = append(pqs, pq)
mr -= mc
metrics += mc
// We need to dump the current chunk of metrics for one of two reasons:
// 1) We filled up the metric quota while processing the current resource
// 2) We are at the last resource and have no more data to process.
// 3) The query contains more than 100,000 individual metrics
if mr > 0 || nRes >= e.Parent.MaxQueryObjects || len(pqs) > 100000 {
log.Printf("D! [inputs.vsphere]: Queueing query: %d objects, %d metrics (%d remaining) of type %s for %s. Processed objects: %d. Total objects %d",
len(pqs), metrics, mr, res.name, e.URL.Host, total+1, len(res.objects))
// Don't send work items if the context has been cancelled.
if ctx.Err() == context.Canceled {
return
}
// Run collection job
submitChunkJob(ctx, te, job, pqs)
pqs = make([]types.PerfQuerySpec, 0, e.Parent.MaxQueryObjects)
metrics = 0
nRes = 0
}
}
total++
nRes++
}
// Handle final partially filled chunk
if len(pqs) > 0 {
// Run collection job
log.Printf("D! [inputs.vsphere]: Queuing query: %d objects, %d metrics (0 remaining) of type %s for %s. Total objects %d (final chunk)",
len(pqs), metrics, res.name, e.URL.Host, len(res.objects))
submitChunkJob(ctx, te, job, pqs)
}
// Wait for background collection to finish
te.Wait()
}
func (e *Endpoint) collectResource(ctx context.Context, resourceType string, acc telegraf.Accumulator) error {
res := e.resourceKinds[resourceType]
client, err := e.clientFactory.GetClient(ctx)
if err != nil {
return err
}
now, err := client.GetServerTime(ctx)
if err != nil {
return err
}
// Estimate the interval at which we're invoked. Use local time (not server time)
// since this is about how we got invoked locally.
localNow := time.Now()
estInterval := time.Duration(time.Minute)
if !res.lastColl.IsZero() {
estInterval = localNow.Sub(res.lastColl).Truncate(time.Duration(res.sampling) * time.Second)
}
log.Printf("D! [inputs.vsphere] Interval estimated to %s", estInterval)
latest := res.latestSample
if !latest.IsZero() {
elapsed := now.Sub(latest).Seconds() + 5.0 // Allow 5 second jitter.
log.Printf("D! [inputs.vsphere]: Latest: %s, elapsed: %f, resource: %s", latest, elapsed, resourceType)
if !res.realTime && elapsed < float64(res.sampling) {
// No new data would be available. We're outta here!
log.Printf("D! [inputs.vsphere]: Sampling period for %s of %d has not elapsed on %s",
resourceType, res.sampling, e.URL.Host)
return nil
}
} else {
latest = now.Add(time.Duration(-res.sampling) * time.Second)
}
internalTags := map[string]string{"resourcetype": resourceType}
sw := NewStopwatchWithTags("gather_duration", e.URL.Host, internalTags)
log.Printf("D! [inputs.vsphere]: Collecting metrics for %d objects of type %s for %s",
len(res.objects), resourceType, e.URL.Host)
count := int64(0)
var tsMux sync.Mutex
latestSample := time.Time{}
// Divide workload into chunks and process them concurrently
e.chunkify(ctx, res, now, latest, acc,
func(chunk []types.PerfQuerySpec) {
n, localLatest, err := e.collectChunk(ctx, chunk, res, acc, now, estInterval)
log.Printf("D! [inputs.vsphere] CollectChunk for %s returned %d metrics", resourceType, n)
if err != nil {
acc.AddError(errors.New("While collecting " + res.name + ": " + err.Error()))
}
atomic.AddInt64(&count, int64(n))
tsMux.Lock()
defer tsMux.Unlock()
if localLatest.After(latestSample) && !localLatest.IsZero() {
latestSample = localLatest
}
})
log.Printf("D! [inputs.vsphere] Latest sample for %s set to %s", resourceType, latestSample)
if !latestSample.IsZero() {
res.latestSample = latestSample
}
sw.Stop()
SendInternalCounterWithTags("gather_count", e.URL.Host, internalTags, count)
return nil
}
func alignSamples(info []types.PerfSampleInfo, values []int64, interval time.Duration) ([]types.PerfSampleInfo, []float64) {
rInfo := make([]types.PerfSampleInfo, 0, len(info))
rValues := make([]float64, 0, len(values))
bi := 1.0
var lastBucket time.Time
for idx := range info {
// According to the docs, SampleInfo and Value should have the same length, but we've seen corrupted
// data coming back with missing values. Take care of that gracefully!
if idx >= len(values) {
log.Printf("D! [inputs.vsphere] len(SampleInfo)>len(Value) %d > %d", len(info), len(values))
break
}
v := float64(values[idx])
if v < 0 {
continue
}
ts := info[idx].Timestamp
roundedTs := ts.Truncate(interval)
// Are we still working on the same bucket?
if roundedTs == lastBucket {
bi++
p := len(rValues) - 1
rValues[p] = ((bi-1)/bi)*float64(rValues[p]) + v/bi
} else {
rValues = append(rValues, v)
roundedInfo := types.PerfSampleInfo{
Timestamp: roundedTs,
Interval: info[idx].Interval,
}
rInfo = append(rInfo, roundedInfo)
bi = 1.0
lastBucket = roundedTs
}
}
//log.Printf("D! [inputs.vsphere] Aligned samples: %d collapsed into %d", len(info), len(rInfo))
return rInfo, rValues
}
func (e *Endpoint) collectChunk(ctx context.Context, pqs []types.PerfQuerySpec, res *resourceKind, acc telegraf.Accumulator, now time.Time, interval time.Duration) (int, time.Time, error) {
log.Printf("D! [inputs.vsphere] Query for %s has %d QuerySpecs", res.name, len(pqs))
latestSample := time.Time{}
count := 0
resourceType := res.name
prefix := "vsphere" + e.Parent.Separator + resourceType
client, err := e.clientFactory.GetClient(ctx)
if err != nil {
return count, latestSample, err
}
metricInfo, err := client.CounterInfoByName(ctx)
if err != nil {
return count, latestSample, err
}
ems, err := client.QueryMetrics(ctx, pqs)
if err != nil {
return count, latestSample, err
}
log.Printf("D! [inputs.vsphere] Query for %s returned metrics for %d objects", resourceType, len(ems))
// Iterate through results
for _, em := range ems {
moid := em.Entity.Reference().Value
instInfo, found := res.objects[moid]
if !found {
log.Printf("E! [inputs.vsphere]: MOID %s not found in cache. Skipping! (This should not happen!)", moid)
continue
}
buckets := make(map[string]metricEntry)
for _, v := range em.Value {
name := v.Name
t := map[string]string{
"vcenter": e.URL.Host,
"source": instInfo.name,
"moid": moid,
}
// Populate tags
objectRef, ok := res.objects[moid]
if !ok {
log.Printf("E! [inputs.vsphere]: MOID %s not found in cache. Skipping", moid)
continue
}
e.populateTags(&objectRef, resourceType, res, t, &v)
nValues := 0
alignedInfo, alignedValues := alignSamples(em.SampleInfo, v.Value, interval) // TODO: Estimate interval
for idx, sample := range alignedInfo {
// According to the docs, SampleInfo and Value should have the same length, but we've seen corrupted
// data coming back with missing values. Take care of that gracefully!
if idx >= len(alignedValues) {
log.Printf("D! [inputs.vsphere] len(SampleInfo)>len(Value) %d > %d", len(alignedInfo), len(alignedValues))
break
}
ts := sample.Timestamp
if ts.After(latestSample) {
latestSample = ts
}
nValues++
// Organize the metrics into a bucket per measurement.
mn, fn := e.makeMetricIdentifier(prefix, name)
bKey := mn + " " + v.Instance + " " + strconv.FormatInt(ts.UnixNano(), 10)
bucket, found := buckets[bKey]
if !found {
bucket = metricEntry{name: mn, ts: ts, fields: make(map[string]interface{}), tags: t}
buckets[bKey] = bucket
}
// Percentage values must be scaled down by 100.
info, ok := metricInfo[name]
if !ok {
log.Printf("E! [inputs.vsphere]: Could not determine unit for %s. Skipping", name)
}
v := alignedValues[idx]
if info.UnitInfo.GetElementDescription().Key == "percent" {
bucket.fields[fn] = float64(v) / 100.0
} else {
bucket.fields[fn] = v
}
count++
// Update highwater marks
e.hwMarks.Put(moid, ts)
}
if nValues == 0 {
log.Printf("D! [inputs.vsphere]: Missing value for: %s, %s", name, objectRef.name)
continue
}
}
// We've iterated through all the metrics and collected buckets for each
// measurement name. Now emit them!
for _, bucket := range buckets {
acc.AddFields(bucket.name, bucket.fields, bucket.tags, bucket.ts)
}
}
return count, latestSample, nil
}
func (e *Endpoint) populateTags(objectRef *objectRef, resourceType string, resource *resourceKind, t map[string]string, v *performance.MetricSeries) {
// Map name of object.
if resource.pKey != "" {
t[resource.pKey] = objectRef.name
}
if resourceType == "vm" && objectRef.altID != "" {
t["uuid"] = objectRef.altID
}
// Map parent reference
parent, found := e.getParent(objectRef, resource)
if found {
t[resource.parentTag] = parent.name
if resourceType == "vm" {
if objectRef.guest != "" {
t["guest"] = objectRef.guest
}
if c, ok := e.resourceKinds["cluster"].objects[parent.parentRef.Value]; ok {
t["clustername"] = c.name
}
}
}
// Fill in Datacenter name
if objectRef.dcname != "" {
t["dcname"] = objectRef.dcname
}
// Determine which point tag to map to the instance
name := v.Name
instance := "instance-total"
if v.Instance != "" {
instance = v.Instance
}
if strings.HasPrefix(name, "cpu.") {
t["cpu"] = instance
} else if strings.HasPrefix(name, "datastore.") {
t["lun"] = instance
if ds, ok := e.lun2ds[instance]; ok {
t["dsname"] = ds
} else {
t["dsname"] = instance
}
} else if strings.HasPrefix(name, "disk.") {
t["disk"] = cleanDiskTag(instance)
} else if strings.HasPrefix(name, "net.") {
t["interface"] = instance
} else if strings.HasPrefix(name, "storageAdapter.") {
t["adapter"] = instance
} else if strings.HasPrefix(name, "storagePath.") {
t["path"] = instance
} else if strings.HasPrefix(name, "sys.resource") {
t["resource"] = instance
} else if strings.HasPrefix(name, "vflashModule.") {
t["module"] = instance
} else if strings.HasPrefix(name, "virtualDisk.") {
t["disk"] = instance
} else if v.Instance != "" {
// default
t["instance"] = v.Instance
}
}
func (e *Endpoint) makeMetricIdentifier(prefix, metric string) (string, string) {
parts := strings.Split(metric, ".")
if len(parts) == 1 {
return prefix, parts[0]
}
return prefix + e.Parent.Separator + parts[0], strings.Join(parts[1:], e.Parent.Separator)
}
func cleanGuestID(id string) string {
return strings.TrimSuffix(id, "Guest")
}
func cleanDiskTag(disk string) string {
// Remove enclosing "<>"
return strings.TrimSuffix(strings.TrimPrefix(disk, "<"), ">")
}